Lista is an excellent location for listening to UK stations on mediumwave. On a clear day you can almost see across the North Sea to England from Lista… 😉
One of the UK stations which have eluded me over the years is Swansea Sound in Wales. 1170 kHz is usually dominated by Magic AM in Stockton-on-Tees, hearing other stations from the UK on this frequency is quite difficult. The signal of Swansea Sound made it to my radio on both January 2011 and March 2013, however. Chief Engineer Mike Winston confirmed my reception of the station with an e-mail some time ago.
Swansea Sound is one of few stations left in the UK still carrying independent programming. Their AM transmitter transmits with a modest power of 580 watts.